Fire extinguisher container



Jan. 17, 1933. 1.. J. DUGAS FIRE EXTINGUiSI-IER CONTAINER Filed Dec. 13, 1928 sdfplgyas.

(-2 21 5.2 2:1 lodl a Patented Jan. 17, 1933 UNITED STATES PATENT OFFICE LODIAS J. DUGAS, OF CHICAGO, ILLINOIS, ASSIGNOR TO DU-GAS FIRE EXTING-UISHER CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE FIRE EXTINGUISHER CONTAINER Application filed December 13, 1928. Serial No. 325,675.

This invention relates to a fire extinguisher container of the type adapted for use with dry fire extinguishing powders.

A more general use offire extinguishing material in dry, powdered form has hereto fore been largely prevented by reason of certain difficulties thought to be inherent to this type of fire extinguishing device. Where a gas under pressure has prevlously been used for effecting the discharge of the dry fire extinguishing powder upon the scene of confiagration, considerable difiicult-y has been experienced in obtaining and maintaining a constant mixture of the powder with the gas, the tendency being for the powder to mix imperfectly with the gas with the result that the stream of gas being delivered to the point of conflagration would at times be wholly devoid of any powder.

It is therefore an object of this invention to provide a container for dry powdered chemical, having fire extinguishing properties, of such construction as to effect a very thorough and intimate mixture of gas and powder and cause the delivery of such mixture in a stream of substantially constant consistency.

7 Other and further important objects of this invention will become apparent from the disclosures in the specification and ac- 80 companying drawing.

The invention (in a preferred form) is illustrated in the drawing and hereinafter more fully described.

On the drawing: v

Figure 1 is a vertical sectional view of a container embodying the principles of my invention.

Figure 2 is a sectional view taken on line IIII of Fig. 1.

Figure 3 is a sectional view taken on line III- IT of Fig. 1. I

Figure 4 is an enlarged fragmentary secfactured in two sections, an upper section 2 offset inwardly as at 3 and terminating in a lower funnel-shaped bottom 4 and a cylindrical lower section 5 secured to said upper section 2 at said offset portion 3, as by brazing or welding, the cylindrical walls of the two sections merging with each other to give a smooth exterior. The lower cylindrical section 5 extends for a short distance beyond the bottom of the funnel 4 and is provided with a lower beaded edge 6 upon which the container is adapted to stand. An opening 7 is formedin the top of said container provided with a threaded bushing 8 to which any suitable closure member (not shown) may be attached.

The funnel bottom 4, conveniently formed in a spinning operation integral with the upper sect on 2 of said container, is provided at its constricted portion 9 with a short, cylindrical extension 10, externally threaded as at 11 for connection with an elbow fitting 12. The other end of said .elbow 12 is likewise threaded externally as at 13 for connection with a nipple 14 adapted to extend 75 laterally through the side wall of the lower section 5. It will be understood that any suitable conduit (not shown), as for instance a flexible hose, may be connected to the outer end of the nipple 14 for conducting the stream'of gas and fire extinguishing powder,

as will later be explained, to the point of confiagration.

A conduit15, of relatively small bore for leading a gas under pressure into the interior of the container extends obliquely through the upper wall of the container as at 16 into the space enclosed by the funnel-shaped bottom 4. The upper outside end of the conduit 15 is threaded for receiving a union 17 adapted to be connected by suitable piping.

' to a source of gas under pressure. tional view taken on line IVIV of Fig. 2;

The conduit 15 is formed with a straight section 18 extending obliquely to the axis of the container, at which point a bend 19 is made and the conduit continues with a straight section 20 axially of the container.

The conduit 15 is again ofiset as at 22 and terminates in a substantially helical portion 23. Said helical portion 23 for the last part of its length substantially conforms with the curved wall of the funnel bottom 4:, as at 24 and lies closely adjacent thereto. The open end of said helical portion 23 is bevelled as at The beyel 25 is oblique both to the vertical plane and to a plane passing through a diameter of the cylinder in such a manner as to provide a longer outer conduit wall, indicated at 26, and a shorter upper conduit wall, indicated at 27.

ing"application'of D. Julian Block, Serial No. 307,785 entitled: Composition of matter, since material of this composition has practically no tendency to cake or hang up in the container. WVhen it is desired to use the fire extinguisher container, a gas, such as nitrogen, under a considerable pressure, say 125 lbs. per square inch, is introduced through theconduit 15 into the interior of the container 1. By virtue of the bevel 25 formed 0 on the open end of said conduit 15, the gas discharged therefrom' has a tendency not only to follow along the conical wall of the funnel bottom 4 in a downwardly swirling movement, but also to some extent to expand upwardly and inwardly into the body of the powder. The result is a very intimate and thorough mixing of the powder with the gas, so that when the contents of the container are beingdischarged upon the opening of a valve 40 in the discharge nozzle (not shown), a stream of gas'and powder substantially uniform in composition passes out through the bottom opening 10 by way of the elbow 12 and nipple 14. The container 1 is, of course, supported during operation in a vertical upstanding position upon its lower beaded edge 6, there- )y permitting the powder to work' downwardl into the funnel-bottom 4 as fast as it is picked up by the gas and discharged.

I am aware that many changes may be made and numerous details of construction may be varied through a wide range without departing from the principles of this invention, and I, therefore, do not purpose limiting the patent granted'hercon otherwise than necessitated by the prior art.

I claim as my invention:

1. In a container for a dry 'fire extinguishing powder, a receptacle having a sloping bottom converging into a discharge opening for the powder and a conduit for introducing a gas under pressure into the interior of said receptacle, said conduit terminating slightly above said discharge opening and closely adjacent the sloping bottom in a curved end, said curved end being so arranged with respect to the sloping bottom as to deliver said gas in a stream substantially tangential to the sloping bottom and in a plane substantially parallel to the plane of the discharge opening.

2. In a container for a dry fire extinguisher powder, a receptacle having a funnel shaped bottom providinga discharge opening and a gas conduit extending into said receptacle, said conduit terminating slightl above said discharge and closely adjacent t e funnel shaped bottom in a curved end, said curved end being so arranged with respect to the funnel shaped bottom as "to deliver said gas in a stream substantially tangential to the funnel shaped bottom and in a plane substantially parallel to the plane of the discharge opening; y

3. In a container for dry gas fire extinguisher powder, a receptacle having a funnel shaped bottom providing a discharge opening and a gas conduit extending into said receptacle, said conduit being provided at its lower extremity with a helically formed portion lying closely adjacent the wall of said funnel shaped bottom and terminating in a beveled discharge end slightly above said discharge opening, said discharge end being so arranged with respect to the funnel shaped bottom as to deliver said gas into a stream substantially tangential to the funnel shaped bottom and in a plane substantially parallel to the plane of the discharge opening.

4. A fire extinguisher container comprising a cylindrical receptace for powdered material having a funnel shaped bottom spaced above the lower edge of said receptacle, a discharge conduit connected to the funnel shaped bottom and extending laterally through the receptacle side wall and a. gas conduit extending through the top wall of said receptacle into the interior thereof with its end lying within the funnel shaped bottom portion, said end being iielically formed and beveled and terminating closely adjacent the funnel shaped bottom, said helical end being so arranged with respect to the funnel shaped bottom as to deliver said gas in a.

stream substantially tangential to the funnel shaped bottom and in a parallel to the plane of t discharge conduit.

5. A fire extinguisher container comprisplane substantially e opening for the ing a powder receptacle having a funnel shaped bottom, a discharge opening in the funnel shaped bottom and a gas conduit in said receptacle with its discharge end adjacent the inner wall of the funnel shaped bottom, said end being helically formed and terminating slightly above said discharge opening and closing adjacent the funnel shaped bottom, said helical end being so arranged with respect to the funnel shaped bottom as to deliver said gas in a stream sub- Illinois.

5 scribed my name at Chicago, Cook County,

LODIAS J. DUGAS. 

